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W+ Jets

W+ Jets. Varsha Ramakrishnan UW Madison HEP Group meeting 03/30/09. Outline of the Talk. Jet Selection Cuts “Electron-Jet Removal” Properties of all Jets after “Electron-Jet” Removal Leading Jet and Next-to Leading Jet variable distributions Look at Next-to-Next Leading Jet properties

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W+ Jets

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  1. W+ Jets VarshaRamakrishnan UW Madison HEP Group meeting 03/30/09

  2. Outline of the Talk • Jet Selection Cuts • “Electron-Jet Removal” • Properties of all Jets after “Electron-Jet” Removal • Leading Jet and Next-to Leading Jet variable distributions • Look at Next-to-Next Leading Jet properties • Comparison Plots between COT-Only,SVX-Only and COT+SVX Tracks • Track Z Error for the above mention three types of Tracks

  3. Jet Selection Cuts • Jets Clustered with JetClu R=0.4 algorithm • Raw Jet Et corrected to L5 Jet Corrections( Absolute Jet Et Correction) • Jets selected with Corrected Et >15 GeV and |ηD| <=2 • Selection of Tracks associated with a Jet • Loop Over all the Tracks found inside Cone R =0.4 of the Jet • Classify into three types of Tracks based of the Algorithm Used on these Tracks

  4. "Electron Jet Removal" • Question to Ponder !! • Types of “electron” that need to be considered for “Electron Jet “ Removal i.e Plug, Loose,Non-Isolated Electron etc • Actual Process of removing “Electron Jet” • Loop over All the Jets and calculterDeltaR between Each Type of electron and Jets • ONLY the Highest Et Jet with DeltaR <0.4 is Removed

  5. Delta R Between Elctron and Jet after "electron-Jet " removal

  6. Dale Stentz W+jets analysis

  7. For Jets With Corrected Et > 15 Gev and |Eta|<2.0

  8. For Jets With Corrected Et > 5 Gev and |Eta|<2.0

  9. Conclusion: • What Types of electron Do I consider for Electron Jet Removal ? • Also Consider If any of the Electrons come from a Z Boson • These factors affect the Electron Jet factor

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